package Test1;

public class Test1 {
 
	static boolean boo;
	static final int q =100;
 
     public static void main(String[] args) {
    	 double a = 2;
    	 int b = 2;
    	 System.out.println(a/0);
		System.out.println(0.0/0.0);
		System.out.println("abc"+"def");
		 System.out.println(9<<90);
	     short i = 0;
	     i+=1;
	     String str = "123.3";
	     float f = Float.valueOf(str);
	     System.out.println(f);
	     String str1 = ""+f;
	     System.out.println(str1);
	     String str2 = "123";
	     Integer aaaa = Integer.parseInt(str2);
	     int aa = Integer.valueOf(str2);
	     str2.equals(str1);
	     Integer a1 = new Integer(12);
	     Integer a2 = new Integer(12);
	     Integer b1 = -129;
	     Integer b2 = -129;
	     Integer c1 = 128;
	     Integer c2 = -128;
	     Integer d1 = 11;
	     Integer d2 = 11;
	     Integer e1 = new Integer(11);
	     Integer e2 = new Integer(11);
	     System.out.println("jieguowei :"+(e1 == d2)); //false
	     
	     System.out.println(d1==d2);     //true
	     System.out.println();
	     System.out.println(a1 == a2);   //false
	     System.out.println(b1==b2);     //false 
	     System.out.println(c1 == c2);   //false
	     
	    String stra = "aaa";
	    String stra1 = "aaa";
	    System.out.println(stra == stra1);  //true
	    String [] items_1 = new String[4];
	    int [] array1 = new int[4];
	    String []  sds= {"aa","dd"};
	    String [] dafa = new String[]{"dd","dd"};
	    double PI = Math.PI;
	    System.out.println(Math.cos(Math.toDegrees(PI)));
	    String ef = "dd";
	    ef = "ed";
	    System.out.println(ef);
	    System.out.println(Math.round(11.5));
	    String[] strs = new String[4];
	    String[] strs1 = {"",""};
	    String[] strw2 = new String[]{"dd"};
	    String[][] itemsStrings = new String[2][3];
	    itemsStrings[0] = new String[2];
	    
	    
	    {
	    	int aaa;
	    	aaa = 5;
	    
	    	System.out.println(aaa);
	    }
	    
	    {
	    	int aaa;
	    	aaa = 4;
	    	System.out.println(aaa);
	    }
	    
	    int aaa;
	    aaa = 5;
	    System.out.println(aaa);
	    
	   
	}
}
